I have weights designed for the Trex 450 SA plastic grips. If the HK are a copy of that then they would work. If not Then I dont have anything to fit the plastic HK. I have weights fot the T600 plastic grips. PM me with your answer and I can place your order.

Dear Heim,
I would like to order a set of the weight mods for my EXI 450 Pro - TT (All Metal Tail) heli. The blade grips are EXI with the humps on them. The tail slider, slider arms, and bellcrank are all Metal from Microheli. Tail blades are KBDD - 61mm & Main blades are CF - 325mm. Will the mod work if the tail grips already have the humps on them? I am running a 401 Gyro w/ a Futaba Metal Gear S9257 Servo. I have done the Finless Tail Grip Flip Mod already. Will your mod stabilize the tail more or is it even necessary for my heli? I am a newbie, so if you could email me some info on how to install the mod, it would be greatly appreciated. Do you have a site or how do I order this? I am finishing my build so I can try and fly before I lose the summer weather.